کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8018202 1517231 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optical properties of scintillator material BaBr2 films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Optical properties of scintillator material BaBr2 films
چکیده انگلیسی
The BaBr2 films grown by vacuum thermal evaporation prefer three different completely (hkl) oriented growth at different growth parameters and each orientation develops strain due to residual stress. The optical absorption indicates a direct type band gap for these films. The band gap of each (hkl) orientation varies linearly with its uniaxial strain. The three (hkl) orientations show band gap anisotropy (2.94-4.25 eV). The negative (for (101) and (111)) and positive (for (013)) pressure coefficients of band gap are attributed to the strain in Br-Br and Ba-Br bonds along [hkl] respectively. The average pressure coefficient of band gap of all three orientations found to be significantly smaller than that calculated by volumetric pressure dependence.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 157, 15 October 2015, Pages 318-321
نویسندگان
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